Complete the following tasks for this equation: b/7.8 = -2.15. A. Give an estimate for the solution. Be sure to explain how you arrived at the estimate, either by showing an equation or in words. B. Solve the equation. Show or explain your work. C. Compared to your estimate, is your answer reasonable? Explain your answer in complete sentences.

(b) suppose that consolidated power decides to use a level of significance of α = .05, and suppose a random sample of 100 temperature readings is obtained. if the sample mean of the 100 temperature readings is x⎯⎯ = 60.990, test h0 versus ha and determine whether the power plant should be shut down and the cooling system repaired. perform the hypothesis test by using a critical value and a p-value. assume σ = 5. (round your z to 2 decimal places and p-value to 4 decimal places.)